Of those, probably border collies and pitt bulls. I work at a pet hotel, and honestly I used to like labs before I worked there. After being around the 100 psycos, I'll take a border collie's energy. Beagles bugle waaaaay too much (it's one of the things they were bred for, after all), and pitts are absolutely the BIGGEST sweet hearts ever!!! I want to get one eventually. I own a border collie mix.
border collies- i know someone who has a border collie/german shepherd, and it is so smart and friendly! she's really obedient, and has a big vocabulary.